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<title>Function template as_xpr</title>
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<h2><span class="refentrytitle">Function template as_xpr</span></h2>
<p>boost::xpressive::as_xpr — Makes a literal into a regular expression. </p>
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<h2 class="refsynopsisdiv-title">Synopsis</h2>
<div class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../xpressive/reference.html#doxygen.regex__primitives_8hpp" title="Header &lt;boost/xpressive/regex_primitives.hpp&gt;">boost/xpressive/regex_primitives.hpp</a>&gt;

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<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Literal<span class="special">&gt;</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="identifier">as_xpr</span><span class="special">(</span><span class="identifier">Literal</span> <span class="keyword">const</span> <span class="special">&amp;</span> literal<span class="special">)</span><span class="special">;</span></pre></div>
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<a name="id-1.3.44.5.10.54.4"></a><h2>Description</h2>
<p>Use <a class="link" href="namespaceboost_1_1xpressive_1afdf584f20302dd9bc5f8da88442f439b.html" title="Function template as_xpr">as_xpr()</a> to turn a literal into a regular expression. For instance, "foo" &gt;&gt; "bar" will not compile because both operands to the right-shift operator are const char*, and no such operator exists. Use as_xpr("foo") &gt;&gt; "bar" instead.</p>
<p>You can use <a class="link" href="namespaceboost_1_1xpressive_1afdf584f20302dd9bc5f8da88442f439b.html" title="Function template as_xpr">as_xpr()</a> with character literals in addition to string literals. For instance, as_xpr('a') will match an 'a'. You can also complement a character literal, as with ~as_xpr('a'). This will match any one character that is not an 'a'. </p>
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<div class="copyright-footer">Copyright © 2007 Eric Niebler<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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